58743 divided by 86 
The aim is to understand the frequency of 86 in 58743.

On to step 1:
When dividing 5 by 86, we get 0 with a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Take the next digit (8) from the dividend and append it to 5, then repeat: 58 / 86

Advancing to step 2:
58 divided by 86 is 0 with a remainder of 58.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 58 and we're left with 58.
Bring next digit (7) of the dividend behind the 58 and repeat the process: 587 / 86

On to step 3:
The number 86 fits into 587 6 times, leaving a remainder of 71.
Put 6 as the next digit of the answer. 
Result so far: 6.0
If we subtract 516 from 587, we get 71.
Take the next digit (4) from the dividend and append it to 71, then repeat: 714 / 86

Going ahead to step 4:
86 goes into 714 8 times with a remainder of 26.
Put 8 as the next digit of the answer. 
Result so far: 68.0
Deduct 688 from 714 and we're left with 26.
Bring next digit (3) of the dividend behind the 26 and repeat the process: 263 / 86

Advancing to step 5:
86 goes into 263 3 times with a remainder of 5.
Put 3 as the next digit of the answer. 
Result so far: 683.0
If we subtract 258 from 263, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 6:
86 goes into 50 0 times with a remainder of 50.
Record the quotient 0 as the next digit in the result. 
Result so far: 683.0
The remainder is 50 after subtracting 0 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Advancing to step 7:
500 divided by 86 is 5 with a remainder of 70.
Record the quotient 5 as the next digit in the result. 
Result so far: 683.05
If we take 430 away from 500, we end up with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

On to step 8:
If we divide 700 by 86, we get 8 and a remainder of 12.
Record the quotient 8 as the next digit in the result. 
Result so far: 683.058
If we subtract 688 from 700, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 9:
If we divide 120 by 86, we get 1 and a remainder of 34.
Record the quotient 1 as the next digit in the result. 
Result so far: 683.0581
Subtract 86 from 120 to get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

On to step 10:
If we divide 340 by 86, we get 3 and a remainder of 82.
Use 3 as the next digit of our solution. 
Result so far: 683.05813
Deduct 258 from 340 and we're left with 82.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

Going ahead to step 11:
86 goes into 820 9 times with a remainder of 46.
Write down 9 as next digit of the result. 
Result so far: 683.058139
Deduct 774 from 820 and we're left with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Step 12:
86 can be fit into 460 5 times, resulting in a remainder of 30.
Write down 5 as next digit of the result. 
Result so far: 683.0581395
Deduct 430 from 460 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 13:
300 divided by 86 is 3 with a remainder of 42.
Write down 3 as next digit of the result. 
Result so far: 683.05813953
Subtract 258 from 300 to get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Our division results in 683.05813953 with a remaining 4.2e-08.